Power Window and Door Lock Problem

[boothill2008]

I'm having issues with my power windows and door locks. They will work fine for a few days, and then without warning, stop working which can be a problem when the windows get stuck down. I tried replacing the master switch on the driver's side with no effect. When I use the alarm fob, I can hear a low volume noise like a connection is being made, but the door locks will not work....the alarm will operate though. I heard through the rumor mill that it is typically a ground problem on the WD21, but I'm not sure where to check? Any thoughts?